// Copyright (c) 2008-2010 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

// under the terms of the License "Eclipse Public License v1.0"

// which accompanies this distribution, and is available

// at the URL "http://www.eclipse.org/legal/epl-v10.html".

//

// Initial Contributors:

// Nokia Corporation - initial contribution.

//

// Contributors:

//

// Description:

//

/**

 @file

 @internalTechnology

*/

#include <e32base.h>

#include <d32usbdi.h>

#include <d32usbtransfers.h>

#include "msctypes.h"

#include "shared.h"

#include "msgservice.h"

#include "botmsctypes.h"

#include "mprotocol.h"

#include "mtransport.h"

#include "cbulkonlytransport.h"

#include "cusbhostmslogicalunit.h"

#include "cusbhostmsdevice.h"

#include "cusbmssuspendresume.h"

#include "msdebug.h"

#include "debug.h"

CUsbHostMsDevice* CUsbHostMsDevice::NewL(THostMassStorageConfig& aConfig)

    {

    __MSFNSLOG

	CUsbHostMsDevice* r = new (ELeave) CUsbHostMsDevice(aConfig);

	CleanupStack::PushL(r);

	r->ConstructL();

	CleanupStack::Pop();

	return r;

	}

void CUsbHostMsDevice::ConstructL()

    {

    __MSFNLOG

	iTimer = CPeriodic::NewL(CActive::EPriorityStandard);

	iTimerRunning = EFalse;

    }

CUsbHostMsDevice::CUsbHostMsDevice(THostMassStorageConfig& aConfig)

:	iConfig(aConfig),

	iState(EReady)

    {

    __MSFNLOG

	}

CUsbHostMsDevice::~CUsbHostMsDevice()

    {

    __MSFNLOG

	delete iTransport;

	delete iDeviceSuspendResume;

	if (iTimer && iTimerRunning)

		{

		iTimer->Cancel();

		}

	delete iTimer;

	}

MTransport* CUsbHostMsDevice::InitialiseTransportL(TTransportType aTransportId)

    {

    __MSFNLOG

	switch(aTransportId)

        {

	case BulkOnlyTransport:

		return CBulkOnlyTransport::NewL(iConfig.iInterfaceToken);

	default:

	//		Panic;

		__HOSTPRINT(_L("Unsupported Transport class requested"));

		User::Leave(KErrNotSupported);

		return NULL;

        }

    }

void CUsbHostMsDevice::InitialiseL(const RMessage2& aMessage)

	{

    __MSFNLOG

	iTransport = InitialiseTransportL((TTransportType) iConfig.iTransportId);

	TRAPD(r, iDeviceSuspendResume = CUsbMsIfaceSuspendResume::NewL(iTransport, this));

	if(r != KErrNone)

		{

		delete iTransport;

		User::Leave(r);

		}

	iTransport->GetMaxLun(&iMaxLun, aMessage);

	}

void CUsbHostMsDevice::UnInitialiseL()

    {

    __MSFNLOG

	StopTimer();

    iLuList.RemoveAllLuL();

    }

TInt CUsbHostMsDevice::AddLunL(TLun aLun)

    {

    __MSFNLOG

    TInt r = KErrNone;

	StartTimer();

    CUsbHostMsLogicalUnit* lu = CUsbHostMsLogicalUnit::NewL(aLun);

    CleanupStack::PushL(lu);

    TRAP(r, lu->InitialiseProtocolL(aLun, iConfig, *iTransport));

	if (r == KErrNone)

		{

		TRAP(r, iLuList.AddLuL(lu));

		}

    if (r != KErrNone)

        {

        CleanupStack::PopAndDestroy(lu);

        }

    else

        {

        CleanupStack::Pop(lu);

        }

    return r;

    }

void CUsbHostMsDevice::RemoveLunL(TLun aLun)

    {

    __MSFNLOG

	if(iLuList.Count() <= 1)

		StopTimer();

	iLuList.RemoveLuL(aLun);

    }

void CUsbHostMsDevice::InitLunL(TLun aLun)

	{

    __MSFNLOG

	CUsbHostMsLogicalUnit& lu = SetLunL(aLun);

    lu.InitL();

	}

void CUsbHostMsDevice::SuspendLunL(TLun aLun)

	{

    __MSFNLOG

    // check whether all the luns are suspended, if so then request usb

    // interface suspension to the transport layer

	for (TInt i = 0; i < iLuList.Count(); i++)

		{

		CUsbHostMsLogicalUnit& lu = iLuList.GetLu(i);

	   	if (!lu.IsReadyToSuspend() && lu.IsConnected())

	   		return;

		}

	for (TInt i = 0; i < iLuList.Count(); i++)

		{

		CUsbHostMsLogicalUnit& lu = iLuList.GetLu(i);

		SetLunL(lu);

		lu.SuspendL();

		}

	StopTimer();

	iDeviceSuspendResume->Suspend();

	iState = ESuspended;

	}

void CUsbHostMsDevice::Resume(TRequestStatus& aStatus)

	{

    __MSFNLOG

	if (iState == ESuspended)

		{

		StartTimer();

		iDeviceSuspendResume->Resume(aStatus);

		}

	}

TLun CUsbHostMsDevice::GetAndSetLunL(const RMessage2& aMessage)

	{

    __MSFNLOG

	// Subssessions need a positive value to store in the handles. We represent Luns as LunId+1

	// We represent LunId in MSC from 0 to MaxLun-1 as represented in BOT so subtract 1 from the Id

    // received from RMessage

    TInt lun = aMessage.Int3() - 1;

    if (lun < 0)

        {

        User::Leave(KErrArgument);

        }

	SetLunL(static_cast<TLun>(lun));

	return static_cast<TLun>(lun);

	}

CUsbHostMsLogicalUnit& CUsbHostMsDevice::GetLuL(TInt aLunNum) const

    {

    return iLuList.GetLuL(aLunNum);

    }

void CUsbHostMsDevice::SetLunL(CUsbHostMsLogicalUnit& aLu)

	{

    __MSFNLOG

    TLun lun = aLu.Lun();

	if (lun <= iMaxLun)

        {

        __HOSTPRINT1(_L("SetLun %d"), lun);

        iTransport->SetLun(lun);

		if (aLu.IsReadyToSuspend())

			{

			aLu.CancelReadyToSuspend();

			}

		}

	}

CUsbHostMsLogicalUnit& CUsbHostMsDevice::SetLunL(TLun aLun)

	{

    __MSFNLOG

    CUsbHostMsLogicalUnit& lu = iLuList.GetLuL(aLun);

    SetLunL(lu);

    return lu;

	}

/**

Starts timer to periodically check LUN. If the timer is not yet running then

start it.

*/

void CUsbHostMsDevice::StartTimer()

	{

    __MSFNLOG

	if (!iTimerRunning)

		{

		// Period of the LUN Ready check

		const TTimeIntervalMicroSeconds32 KInterval = iConfig.iStatusPollingInterval * 1000 * 1000;

		TCallBack callback(TimerCallback, this);

		__HOSTPRINT(_L("Starting timer"));

		iTimer->Start(KInterval, KInterval, callback);

		iTimerRunning = ETrue;

		}

	}

/**

Ensure that the Timer is stopped

*/

void CUsbHostMsDevice::StopTimer()

	{

    __MSFNLOG

	if (iTimer && iTimerRunning)

		{

		__HOSTPRINT(_L("Stopping timer"));

		if (iTimer->IsActive())

			{

			iTimer->Cancel();

			}

		iTimerRunning = EFalse;

		}

	}

/**

A static wrapper for the DoLunReadyCheckEvent member function for use as a timer

callback function.

@param obj 'this' pointer

@return not used in CPeriodic callback (see TCallback)

*/

TInt CUsbHostMsDevice::TimerCallback(TAny* obj)

	{

    __MSFNSLOG

    CUsbHostMsDevice* device = static_cast<CUsbHostMsDevice*>(obj);

	TRAPD(err, device->DoLunReadyCheckEventL());

	return err;

	}

void CUsbHostMsDevice::DoLunReadyCheckEventL()

	{

    __MSFNLOG

	TInt err;

	for (TInt i = 0; i < iLuList.Count(); i++)

		{

		CUsbHostMsLogicalUnit& lu = iLuList.GetLu(i);

		SetLunL(lu);

		TRAP(err, lu.DoLunReadyCheckL());

		}

	}

void CUsbHostMsDevice::DoHandleRemoteWakeupL()

	{

    __MSFNLOG

	DoResumeLogicalUnitsL();

	DoLunReadyCheckEventL();	// For remote wakeup we do not wait for timer to expire

    // check whether all the luns are suspended, if so then request usb

    // interface suspension to the transport layer

	for (TInt i = 0; i < iLuList.Count(); i++)

		{

		CUsbHostMsLogicalUnit& lu = iLuList.GetLu(i);

		// Has any of the logical units have got its state changed?

	   	if ( (lu.IsReadyToSuspend() && !lu.IsConnected()) ||

				(!lu.IsReadyToSuspend() && lu.IsConnected()) )

			{

			StartTimer(); // Now start the timer

	   		return;

			}

		}

	for (TInt i = 0; i < iLuList.Count(); i++)

		{

		CUsbHostMsLogicalUnit& lu = iLuList.GetLu(i);

		SetLunL(lu);

		lu.SuspendL();

		}

	iDeviceSuspendResume->Suspend();

	iState = ESuspended;

	}

void CUsbHostMsDevice::DoResumeLogicalUnitsL()

	{

    __MSFNLOG

	for (TInt i = 0; i < iLuList.Count(); i++)

		{

		CUsbHostMsLogicalUnit& lu = iLuList.GetLu(i);

		SetLunL(lu);

		lu.ResumeL();

		}

	}

void CUsbHostMsDevice::ResumeCompletedL()

	{

    __MSFNLOG

	iState = EReady;

	DoResumeLogicalUnitsL();

	}